CVE-2026-63793: ntfs: serialize volume label accesses

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-19 · updated 2026-08-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently.

Affected products

Linux kernel: from 7.1 before 7.1.3 — fixed in 7.1.3

How to fix

Upgrade to a fixed version: Linux kernel 7.1.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/acd744019460bad22e43d4569a502f9c88d331ae
https://git.kernel.org/stable/c/e9e50ce4f13dc721014af622613409455c734942

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